LAWRENCE, Kan. (DTN) -- Soybean farmers have good reason to feel a little paranoid this spring. A new Iowa State study has found that soybean aphids are conspiring with soybean cyst nematodes (SCN) to weaken the effectiveness of some SCN-resistant soybean varieties.

"The take-home message for farmers is that when soybean aphids are feeding on soybeans that are resistant to SCN, it can lessen their resistance and therefore you could have greater than expected nematode reproduction and yield loss," said Iowa State plant pathologist Greg Tylka, one of the study's authors.

The study used a greenhouse experiment to monitor nematode ...

Quick View

Dr. Dan Talks Agronomy
Can you trim inputs while growing soybeans in 2015? Here's a look at what you can and can't cut.